I know i probably should know but unfortunately i don't, who is Simon Hayes?

By asking this i'm not meaning any disrespect if i should know him just genuinely don't.

Any info/background on him?

Simon is one of the founders of Carlson Gracie London and is by far the most inspirational man I have had the pleasure of meeting and had the privilege of calling my teacher years ago when I first started BJJ. Many, if not all, who know him have the same level of respect I have for him and it's not by coincidence.